Improved solid cartridge



UNITED STATES PATENT OFFICE.

ROBERTS'BARTHOLOW, OF THE UNITED STATES ARMY.

IMPROVED SOLID CARTRIDGE.

Specification forming. part of Letters PatentNo. 36,066, dated August 5, 1 862.

To all whom it may concern Be it known that I, ROBERTS BARTHOLOW, of the United States' Army, have invented certain new and useful I mprovements in Solid Water-Proof Cartridges; and I do hereby. declare that the followingis a full, clear, and exact description of the mode of man ufacturing the same:

I use in the manufacture of the composition photographic collodion-cotton dissolved in a mixture of alc'oholand sulphuric ether, in proportion ofone-third of the former to twothirds of the latter, as follows; photographic collodion-cotton for negatives and positives, one ounce; alcohol, ten ounces; sulphuric ether, eighteen ounces.

The collodion, thus prepared, is mixed with mealed and granulated gunpowder in the pr0- portion of one-third of the former to two-thirds of the latter, according to the following 'formula: mealed powder, five-ounces; granulatedgowider, eleven ounces; collodion, six ounces,

These ingredients are thoroughly incorporated. and pressed into suitable molds or molded without pressure. a

The collodion may also be incorporated with gunpowder, granulated, in the proportion of six ounces of collodion der. The collodion thus prepared answer's'as a coating to render the solid cartridge water-v proof.

The cartridges may be molded in the erid of Having thus fully described my invention,

what I claim as new, and desire to Letters Patent, is-

The use of the within-described water-proot solid cartridge, compounded and constructed substantially as herein specified.

secure by In witness that I claim the foregoing Ihave set my hand in the presence ofwit hereunto nesses.

ROBERTS BARTHOLGW.

Witnesses (l M. ALEXANDER, CHARLES ALEXANDER.

to one pound of pow-J 

